Title :
Electronically switched multiband high-impedance surface with circular and annular patches
Author :
De Sabata, Aldo ; Matekovits, Ladislau ; Peter, Ildiko
Author_Institution :
Fac. of Electron. & Telecommun., Politeh. Univ. of Timisoara, Timisoara, Romania
fDate :
June 30 2011-July 1 2011
Abstract :
A parallel-plate waveguide (PPW), composed of a metal plane above a high impedance surface, based on periodic arrangement of unit cells, realized in microstrip technology is introduced. The novel unit cell consists of a combination of a concentric circular and an annular patch, where each patch is connected to one of the two closing planes through a different number of vias. The structure presents several electromagnetic band-gaps in the microwave range and may be used as a multi-band filter. When diodes are connected within the device, its behavior may be switched from band-stop to band-pass filtering in the lower frequency range. The proposed solution allows eliminating the biasing network, and consequently significantly simplifying the design and manufacturing, since switches can be biased through the continuous closing planes.
Keywords :
band-pass filters; band-stop filters; loop antennas; microstrip antennas; parallel plate waveguides; photonic band gap; surface impedance; PPW; annular patch; band-pass filtering; band-stop filtering; biasing network; circular patch; continuous closing planes; diodes; electromagnetic band-gaps; electronically switched multiband high-impedance surface; high impedance surface; lower frequency range; metal plane; microstrip technology; microwave range; multiband filter; parallel-plate waveguide; periodic arrangement; unit cells; Band pass filters; Metals; Metamaterials; Microwave filters; Periodic structures; Switches;
Conference_Titel :
Signals, Circuits and Systems (ISSCS), 2011 10th International Symposium on
Conference_Location :
lasi
Print_ISBN :
978-1-61284-944-7
DOI :
10.1109/ISSCS.2011.5978759
